Table 3. Experimental details.
| Crystal data | |
| Chemical formula | (NH4)2V3O8 |
| M r | 316.90 |
| Crystal system, space group | Tetragonal, P4b m |
| Temperature (K) | 295 |
| a, c (Å) | 8.9062 (4), 5.5784 (3) |
| V (Å3) | 442.48 (5) |
| Z | 2 |
| Radiation type | Ag Kα, λ = 0.56083 Å |
| μ (mm−1) | 1.60 |
| Crystal size (mm) | 0.06 × 0.06 × 0.03 |
| Data collection | |
| Diffractometer | Stoe Stadivari |
| Absorption correction | Multi-scan (X-RED32; Stoe & Cie, 2019 ▸) |
| T min, T max | 0.410, 1.000 |
| No. of measured, independent and observed [I > 2σ(I)] reflections | 26907, 1106, 930 |
| R int | 0.061 |
| (sin θ/λ)max (Å−1) | 0.823 |
| Refinement | |
| R[F 2 > 2σ(F 2)], wR(F 2), S | 0.016, 0.030, 0.87 |
| No. of reflections | 1106 |
| No. of parameters | 57 |
| No. of restraints | 18 |
| H-atom treatment | All H-atom parameters refined |
| Δρmax, Δρmin (e Å−3) | 0.44, −0.23 |
| Absolute structure | Refined as an inversion twin. |
| Absolute structure parameter | 0.36 (4) |